LXR linux/include/linux/irqchip/chained

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Chained IRQ handlers support.
   4 *
   5 * Copyright (C) 2011 ARM Ltd.
   6 */
   7#ifndef __IRQCHIP_CHAINED_IRQ_H
   8#define __IRQCHIP_CHAINED_IRQ_H
   9
  10#include <linux/irq.h>
  11
  12/*
  13 * Entry/exit functions for chained handlers where the primary IRQ chip
  14 * may implement either fasteoi or level-trigger flow control.
  15 */
  16static inline void chained_irq_enter(struct irq_chip *chip,
  17                                     struct irq_desc *desc)
  18{
  19        /* FastEOI controllers require no action on entry. */
  20        if (chip->irq_eoi)
  21                return;
  22
  23        if (chip->irq_mask_ack) {
  24                chip->irq_mask_ack(&desc->irq_data);
  25        } else {
  26                chip->irq_mask(&desc->irq_data);
  27                if (chip->irq_ack)
  28                        chip->irq_ack(&desc->irq_data);
  29        }
  30}
  31
  32static inline void chained_irq_exit(struct irq_chip *chip,
  33                                    struct irq_desc *desc)
  34{
  35        if (chip->irq_eoi)
  36                chip->irq_eoi(&desc->irq_data);
  37        else
  38                chip->irq_unmask(&desc->irq_data);
  39}
  40
  41#endif /* __IRQCHIP_CHAINED_IRQ_H */
  42